My current routine: Exercise arms, core, and legs through weight training. Every 48 hours. Would it do me any better to adopt a more "Tyler Durden workout" style routine? In which I spend Mondays, Wednesdays, and Fridays, doing specifically arms and legs and Tuesdays, Thursdays, and Saturdays doing specifically chest, abs, and shoulders? This would mean lifting 6 days a week instead of 3. Would this speed up my progress at all or is my current routine better?

hmm that's a lot of work typically u don't need to work a body part more than once or twice a week and im bettin your progress is being hindered by too much work I would suggest that u try the golden six or seven full body three day a week workout with some aeros thrown in just do the basics and go heavy as u can